store return value of a Python script in a bash script

I want to execute a python script from a bash script, and I want to store the output of the python script in a variable.

In my python script, I print some stuff to screen and at the end I return a string with:

sys.exit(myString) 

In my bash script, I did the following:

outputString=`python myPythonScript arg1 arg2 arg3 `

But then when I check the value of outputString with echo $outputString I get everything that the Python script had printed to screen, but not the return value myString!

How should I do this?

EDIT: I need the string because that tells me where a file created by the Python script is located. I want to do something like:

fileLocation=`python myPythonScript1 arg1 arg2 arg1`python myPythonScript2 $fileLocation